{
  "manageEntity": {
    "action": "Save",
    "entityId": "558535065",
    "entityType": "Track",
    "nonce": "0xf66af569944b911e97aebfe26197b31d011b55dd64dd7297920f55e6aef8ecd9",
    "signature": "0x3b1e2f77511b43b7f5fa953de374e8ce7c061144e780e7036ea1326fcb636fe54dcc81142b4a802d7f1ec771d1dbdf55a9875f0ede498b85ab27ee66232fbc2a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}